<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row v-for="(item1, i1) in scope.row.children" :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" :key="item1.id">
                            <!-- 一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                                    {{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环 嵌套二级权限 -->
                                <el-row v-for="(item2,i2) in item1.children" :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" :key="item2.id">
                                    <el-col :span='6'>
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>{{scope.row}}</pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取消</el-button>
                <el-button type="primary" @click="allotRights">确定</el-button>
            </span>
        </el-dialog>

        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClose">
           <!-- 内容主体区 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
             <!-- 底部区 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser" >确 定</el-button>
            </span>
        </el-dialog>

        <!-- 编辑角色的对话框 -->
        <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClose">
           <!-- 内容主体区 -->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
             <!-- 底部区 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserIfo" >确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色的数据
      rolelist: [],
      // 控制分配权限的对话框
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      // 当前即将分配权限角色id
      roleId: '',
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '输入角色名称', trigger: 'blur' },
          { message: '输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '输入角色描述', trigger: 'blur' },
          { message: '输入角色描述', trigger: 'blur' }
        ]
      },
      // 修改角色的表单数据
      editForm: {
        // roleName: '',
        // roleDesc: ''
      },
      // 修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '输入角色名称', trigger: 'blur' },
          { message: '输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '输入角色描述', trigger: 'blur' },
          { message: '输入角色描述', trigger: 'blur' }
        ]
      },
      // 添加角色对话框
      addDialogVisible: false,
      // 修改角色对话框
      editDialogVisible: false
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件', '是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }

      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表数据失败！')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有的三级权限下的id值，并保存到数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性，则三级节点
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        // ...为展开运算符
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        console.log(res)
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      // 重新刷新数据列表
      this.getRolesList()

      this.setRightDialogVisible = false
    },
    // 监听添加角色对话框的关闭事件
    addDialogClose () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          // 红色提示框
          return this.$message.error('添加用户失败')
        }
        // 绿色提示框
        this.addDialogVisible = false
        this.getRolesList()
        this.$message.success('添加用户成功')
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClose () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editUserIfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起修改角色的网络请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) {
          // 红色提示框
          return this.$message.error('更新用户失败')
        }
        // 绿色提示框
        this.editDialogVisible = false
        this.getRolesList()
        this.$message.success('更新用户成功')
      })
    },
    // 根据id删除对应的用户信息
    async removeRolesById (id) {
      // 弹框询问
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确定删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回至为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        // 取消
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-top: 1px solid #eee;
}

.vcenter{
  display: flex;
  align-items: center;
}
</style>
